Roof prism design is extremely light weight, compact and streamlined, easy to pack, carry, hold and use; High definition optics are specially coated for the highest light transmission, sharp edge-to-edge views and contrast, even in low light; N2 injection system seals 14-psi pressurized dry nitrogen into the optic, for fogproof clarity in any condition - from artic cold to desert heat; Fast-Close-Focus central focusing wheel requires minimal rotation for quick, absolute sharpness from close up to infinity; Military grade rubber armoring protects chassis and lenses, reduces noise and provides a sure grip in all conditions; ClicLoc system attaches and releases neck strap or harness instantly with push button ease and designed so binoculars hang straight and action-ready; Matte Black Color